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SPRINKLER MONITORING PRODUCTS
TWO TYPES OF SPRINKLER SYSTEMS USED IN CANADA
DRY SYSTEM (In areas where water can freeze)
WET SYSTEM WITH EXCESS PRESSURE (To prevent false alarms from pressure fluctuations in the water supply)
WE WILL LOOK AT BOTH WITH SPRINKLER MONITORING DEVICES INSTALLED
PS40 Low Air Pressure Switch to monitor drop in air pressure
Supervisory Device
BVL Pump is used to pressurize system to 40 lbs – Some Dry Systems now have lower Supervisory pressures – around 20 lbs (Depends on valve)
This allows for supervision of the piping and keeps water from entering the dry system
No Pressure
Air Pressure
Water Pressure
PS10 to monitor
the Alarm Port
Alarm Device
OSYSU to monitor gate valve position (Open or Close) Supervisory Device
Ball valves on the alarm port should be monitored using RBVS Supervisory Device
PS120 is used to monitor the excess pressure
Supervisory Device
PS10 Pressure type
Water Flow Switch monitors water flow in the alarm line
Alarm Device
To water motor gong
Excess pressure pump is used to pressure system to approximately 120 lbs
No pressure Water supply Excess pressure
OSYSU to monitor gate valve position (Open or Close) Supervisory Device
Ball valves on the alarm port should be monitored using RBVS Supervisory Device
ALARM DEVICES Sprinkler alarm devices activate a RED LED on the fire panel
This will indicate a fire emergency
Smoke or Heat Detectors
Manual pull stations
Sprinkler Water Flow Devices (Water Flow Switch or Water Flow Pressure Switch)
THREE TYPES OF WATER-FLOW ALARM DETECTION SWITCHES
(VSR-S) Vane (Paddle) screw mount style for smaller pipe sizes (1/2” to 2” sizes)
(VSR) Vane saddle style with U Bolt mounting for pipe sizes from 2” up to 10”
PS10 Pressure type of water
flow detection (Detects increase of water pressure in the Alarm Line)
WATER FLOW SWITCH FEATURES Complete separation of the contacts to allow
both 120VAC and 24VDC wiring
Field replaceable contact switches and Pneumatic Retard. (Switch replacement without discharging sprinkler system)
Pneumatic Retard timer from 0 to 90 seconds (Reduce False alarms)
Non-corrosive insert (saddle) along with composite trip stem means there is no water to metal contact. Also no dissimilar metals contact. (Eliminates the possibility of Corrosion)
Visual (White Flag) indicator to indicate paddle activation. Flag is visible in normal condition and not visible when activated. (No volt meter or continuity tester required)
NEMA 4 Standard Enclosure
WATER-FLOW SWITCH INSTALLATION – U BOLT STYLE
Water-Flow Switch Mounting
VSR-F
PCVS
2” Main DrainSupply pressure gauge
System pressure gauge
Butterfly valve
Riser check valve
Riser to sprinklers
From water supply
Vane type water- flow switches can be installed in either vertical or horizontal sections of pipe. If they are installed in a horizontal section, they must be installed on the top half of the pipe. This is to prevent any debris in the pipe from falling into the throat area of the flow switch and affecting the paddle movement.
Vertical Horizontal
DRILLING THE PIPE HOLE Drill the correct size hole for the flow switch. The hole should be de-burred and
the inside of the pipe should be cleaned of any rust, scale or corrosion.
The flow switch should be centered in the pipe and the “U” bolt should be tightened evenly. This will prevent the paddle from dragging on the inside of the pipe and prevent the flow switch from leaking.
Do not trim the paddle.
1.25” to 2” hole size depending on the water flow switch model
Do not leave cover off for extended period of time
Tighten U Bolt nuts alternatively
Mount on pipe so arrow on saddle points in the direction of water-flow
Roll paddle in opposite direction of water-flow
Pneumatic Retard Timer should be set to reduce false alarms
To Sprinklers
Riser Drain valve, closed
VSR-F OSYSU
Upon activation of a Sprinkler Head, water will begin to flow in the sprinkler piping
When the flow rate reaches 10 GPM, the
Water Flow switch will activate an Alarm condition on the FACP
PADDLE TENSION ADJUSTMENTS
Spring tension indicator
Sensitivity adjustment screw. Turn clockwise to increase activation flow rate. Counter clockwise to decrease activation flow rate
WATER-FLOW SWITCH INSTALLATION – SCREW MOUNT STYLE
INSTALLING SCREW TYPE WATER-FLOW SWITCH When installing the screw mount type into a tee fitting, the proper sized tee must be used. Never use a reducing bushing to make the switch fit the tee. Bushings prevent the paddle from being in the proper location in the tee.
Also make certain that the correct paddle for the size and type of piping is used and that the paddle is on the stem tight. (VSR-S Comes with different sized paddle kits)
The flow switch must be screwed into the tee to the proper depth.
WIRING PADDLE TYPE WATER FLOW SWITCHES
WATER-FLOWN SWITCH TESTING ULC-S536
VSR Series Water – Flow and PS10
6.7.8.1 Water flow Detection Devices
6.7.8.1.1 Each water flow detecting device shall be inspected and tested to confirm operability, including the following functions, as applicable:
A Water flow detecting devices (paddle and pressure type) including associated input circuits, shall be tested by an appropriate water flow means; and
B Time delay setting shall be recorded in the individual device record. (Refer to Appendix C3.2, Individual Device Record.)
PS10 Water Flow Pressure Switch (Detects Water
Pressure)
Primarily used to detect water pressure increase in the alarm line (6 PSI)
Dual contact model operates on Pressure Increase of 6 PSI and Decrease of 5 PSI
Adjustment Range is between 4 – 20 PSI
Activates the Water Motor Gong
Water in the alarm line also
activates the PS10 when the
pressure reaches 6 PSI
The PS10 is used as an alarm
device in both dry and wet systems applications
6 PSI
When a sprinkler head activates water flows into the alarm line
The alarm line has a water motor gong
In normal conditions the alarm line has no water or pressure
There is also a Low air or excess pressure supervisory switch depending on the system
WIRING WATER-FLOW PRESSURE SWITCHES
PS10
Flow Alarm Bell Alarm Low Pressure Signal
METER THE CONTACTS
COMM NO NC
The contact’s output should be metered to ensure that it produces the appropriate output condition
Example - In this scenario the contact should be wired (Common & N/C) because the logic is shown as being N/C on Alarm! On other devices the reverse can be true!
The contact logic can also show alarm wiring as terminals A & C
Manufacturers use various contact labels and logic where N/C and N/O may mean the contrary
TO FIRE PANEL
A C
A B C
SUPERVISORY DEVICES Sprinkler supervisory devices activate an AMBER LED on the fire panel
This will indicate a supervisory condition (Abnormal)
• Closed control valve or ball valve (Tamper switch )
• High/low air pressure switch
• Water Tank Level switches
• Low Temperature Switches
TROUBLE CONDITIONS
A break or short in the supervised wiring
A trouble condition indicates a problem with the control panel or associated
wiring which may render the system inoperable
A trouble will activate a YELLOW LED
Loss of secondary power (battery)
Loss of primary power (120VAC)
WIRE SUPERVISION ON THE SPRINKLER DEVICES
Sprinkler devices use an end of line resistor (EOLR) to supervise the wiring
5.1K
The resistive value differs depending on the
panel design. In this example = 5.1K ohms
When the wiring is intact, the panel detects the 5.1 K resistive load and the condition remains normal
SPRINKLER DEVICE
If there is a break or short in the wiring, the panel no longer detects the 5.1K load and activates a trouble condition
TROUBLE
PRESSURE & VALVE MONITORING SWITCHES
SUPERVISORY PRESSURE SWITCH FEATURES
PS40 and PS120 Designed to detect a pressure increase or decrease (Water or Air) Pressure setting is factory set, but pressure range can be adjusted in the field Each model has its own specific pressure range Models available with single or dual contact output Contacts designed to accommodate AC and DC voltages
NEMA 4 Enclosure
Models available with either brass or nylon fittings
PS40 Low Air Pressure Switch
Primarily used to detect a pressure decrease in Dry-Systems
Dual contact model operates on Pressure Decrease of 30 PSI and Increase of 50 PSI
Adjustment Range is between 10 – 60 PSI
Dry Systems are installed in unheated buildings or
where there is a danger of sprinkler pipes freezing.
(Underground Parking Garage Areas)
PS10A
BVS
The air pressure also keeps the dry
pipe valve closed which prevents water
from accidently entering the system
A pressurized systems allows for
supervision of the piping in case
of leaks
Low air pressure switch is installed to
monitor the air pressure. The switch is
set to trip on the decrease at 30 PSI
Dry systems have roughly
40 lbs of pressurized air in
the sprinkler piping
PS40
PS40A
BVL PS10A
RBVS
In the event of a fire, the sprinkler head opens allowing water to run and the pressure in the system to drop.
When the pressure drops down to 30 PSI, the PS40 contacts will activate to produce a Supervisory condition
Water will also flow in the alarm port activating the PS10
PS40A
BVL PS10A
RBVS
BVL (Bleeder Valve) Allows the PS40 to be tested without bleeding the system pressure
RBVS can be used to monitor any ball valves on the system
ADDITIONAL DEVICES THAT SHOULD BE INSTALLED ON DRY SYSTEMS
Preassembled Ps40-TM can be installed to facilitate low air test
RTS-O (Room Temperature
Switch) Will activate when
temperature drops to 40F or
5C
PS120 Excess Pressure Supervisory Switch
Primarily used to detect a pressure decrease in Wet Systems under Excess Pressure
Operates on Pressure Decrease of 110 PSI and Increase of 130 PSI
Adjustment Range is between 25 – 175 PSI
PS120
Wet systems with excess pressure are used in Canada to minimize false alarms
The system is pressurized to 120 lbs by an excess pressure pump
The excess pressure keeps the valve clapper closed, so fluctuations from the city’s water supply does not get into the system side
A PS120 is used
to monitor the excess pressure
In the event of a fire, the sprinkler head opens allowing the clapper to open and water to flow in the system. This also creates a pressure drop in the system
When the pressure drops to 110 PSI, the PS120 activates to produce a supervisory condition
Open sprinkler head
Leak in the system
Excess Pressure Pump Failure
PRESSURE SWITCH INSTALLATION 1. Connect the pressure switch to the appropriate valve as per
data sheet instructions
2. Apply Teflon tape to the threaded male connection on the device. (Do not use pipe dope)
3. Device should be mounted in the upright position. (Threaded connection down)
4. Tighten the device using a wrench on the flats on the device.
Nylon or brass fitting is ½” NPT
WIRING PRESSURE SWITCHES
TO FIRE ALARM PANEL
PRESSURE DECREASE PRESSURE INCREASE
WIRING PRESSURE SWITCHES
PRESSURE INCREASE & DECREASE ON SAME PAIR OF WIRES
LOW PRESSURE SWITCH SUPERVISORY TESTING ULC-S536
PS40 & PS120
6.7.8.2.2 Each low pressure supervisory device shall be inspected and tested to confirm the operability of the following functions, as applicable:
A) A decrease of pressure beyond the set limit results in an audible trouble signal and a visual indication; and
B) The low pressure (kPa) setting at which the device initiates a trouble signal and the upper pressure setting where the device is no longer activated shall be recorded. (Refer to AppendixC3.2, Individual Device Record.)
TAMPER SUPERVISORY DEVICES
KEY FEATURES ON OSYSU & PCVS
OSYSU & PCVS
NEMA 4X* (IP 65) and 6P (IP 67) *Enclosure is 4X. For additional
corrosion protection of mounting hardware, use model PCVS-2 CRH
-40º to 140º (-40ºC to 60ºC) operating temperature range
Visual Switch Indicators Two conduit entrances Adjustable length trip rod Accomodates up to 12AWG wire Switch detects tampering and
valve closure RoHS compliant (Lead free
components) Two SPDT contacts
ADDITIONAL FEATURES ON OSYSU Three position switch detects tampering and valve closure Knurled mounting bracket prevents slipping Fine adjustment feature for fast, easy installation
One or two SPDT contact models (-1,-2)
PS40A
BVL PS10A
BVS
OSYSU (Outside Screw & Yoke) Gate Valves with moving stem
OSYSU VALVE REQUIRES OSYSU SWITCH
OSYSU SWITCH Bracket
Clamp bar
Carriage bolts [2]
RollerGroove
Yoke
Valve stem
Trip Rod
Packing Gland
Slotted mountingholes for fineadjustment
As the valve is being shut the trip rod roller moves along the valve stem until it activates
OSYSU SWITCH
BracketClamp bar
Carriage bolts [2]
RollerGroove
Yoke
Valve stem
Trip Rod
Packing Gland
Slotted mountingholes for fineadjustment
OSYSU is set to operate within two turns of the valve handle or when the stem of the valve has moved 20% of the distance from its normal position
Some OSYSU Valves come with a notch already included on its stem. Some valves may require the installer to file one on the stem. The trip rod arm of the
switch will ride along the stem until it moves outside of the notch. This will activate the switch.
INSTALLING ON OSYSU VALVES
Please check with data sheet for installing on small and large gate valves
BUTTERFLY VALVES REQUIRE PCVS SWITCH
Butterfly Valves have a moving cam when the valve is opened or closed
As the valve is being closed the cam activates the trip rod on PCVS Switch
INSTALLING ON BUTTERFLY VALVES
Please check with data sheet for installing on butterfly valves
POST INDICATOR VALVES REQUIRE A PCVS SWITCH
Target moves up as valve is shut-off
Target moves down as valve is shut-off
PCVS trip rod is activated by a moving target that can move up or down (depending upon installation)
PCVS should be oriented appropriately (When the valve is fully open the target should be pushing the trip rod against the spring force of the rod)
INSTALLING ON POST INDICATOR VALVES
Please check with data sheet to install on post indicator valves KEY POINTS TO KEEP IN MIND When the valve is fully open, the target should be pushing the trip rod against the spring force of the rod (You may need to reverse the position of the switch for this to happen) As the valve is closed, the spring force causes the rod to follow the target of the valve, tripping the switch.
WIRING OSYSU & PCVS SWITCHES
TESTING SHUT OFF VALVE MONITORING SWITCHES ULC-536
6.7.8.2 Supervisory Devices 6.7.8.2.1 Each shut-off valve position supervisory switch shall be tested to determine that within two turns of the valve handle, or when the stem of the valve has moved 20% from its normal position, it shall result in a supervisory signal. 6.7.8.4 Supervisory Devices – Other Types (RBVS, PTS-C and RTS) 6.7.8.4.1 Each device shall be inspected and tested to confirm the operability of the following functions, as applicable: A Installed correctly; and B Tested in accordance with the manufacturer’s requirements, or an appropriate test means, to ensure that the correct operation will result in an audible trouble signal and a visual indication.
QUESTIONS